Thanks for the query. This is a rare presentation and can be seen in few diseases. You can consult a dermatologist with experience in treating such disease. The primary objective is to identify the underlying situation and then plan the treatment. You can refer to this link for some information though the language may be very technical. Let me know if you need any help. http://www.e-ijd.org/article.asp?issn=0019-5154;year=2016;volume=61;issue=3;spage=348;epage=348;aulast=Agarwala